Statue
There was a small chest in front of the statue that was similar to the ones in the first room he encountered. The difference was that this chest was incredibly tiny. He could guess that nothing big would fit in it, so he expected one out of two things.
The chest was closed, so he bent down and opened it. Inside was what he expected would be there - another piece of the ruby slip he had been collecting. It was the third piece so far and it seemed to be the final one.
He took out the combined piece from before and held them together. When he did, the two attracted each other and shot out of his hands. They snapped into place, setting off a chain reaction.
A huge amount of aura was released from the small slip in his hand. It startled him a little so he quickly put up an Arcane Shield around himself.